thompson



(No Model.) y Y. THOMPSON. MOTOR FOR SEWING MACHINES. No. 316,850.Patented Apr. 28, 1885.

. gin-- WITNESSES IIVVENTOR V 7 a: 6 Cl C V L. m E/ V v 3' a TENS.Phuwuuw m mr. Wnhinglom D. C.

MnLoHnsEDEoK YOUNG THOMPSON, OF ARKADELPHIA, 'ARKANsAs. l

MOTOR FOR SEWING-MACHINES."

" f SPEd IFIQATI01ifjr nfing partof Letters Patent No.316,850,datedApri1 28, less.

Application filed November 25,1884. (No model.)

To all tuh o m, 'it mag concern I "Beit' known that I, MELOHESEDEOK YJTHOMPSON, a citizen of the United States, re-

sidi'ng'at Arkadelphia,'in the county of Clark and Stateof Arkansas,have invented certain new and useful'Iinprovements in Sewing-MachineMotors; and I do declare the following to bee full, clear, and exactdescription of the invention, such as will enable others skilled intheart to which it appertains to make and use the same, reference beinghad to the accompanying drawings, and to letters or fig urs of referencemarked thereon, which form a part of this specification.

Figure l of the drawings is a side view,part sectional, of my motor.Fig; 2is a front view. of the same. Fig. 3 is a vertical sectional view,and Figs. 4, 5, and 6 are detail views.

This invention relates to improvements in motor inechanism for sewing orother ma in the-construction and novel arrangement of parts hereinafterfully explained, and pointed out in the appended claims.

Reference being had to the accompanying drawings, and to the letters ofreference marked thereon, A represents a' chair of strong con struction,having on its rear legs the casters a a,thesten1s of which are madelongitudinally adjustable in recesses in the ends of the legs to raiseor lower the chair to'different heights. I

j a a are pins or stems made longitudinally adjustable in recesses inthe ends of the front legs for a similar purpose. I j

B is'an' oscillating shaft having bearings in the front ends of the siderails of the seatof the chair, and situated below and slightly forwardof the front rail of the same. b is a hood, of metal or other propersubstance, fitting partially over said shaft, with its upper or rearedge fixed to the seat of the'chair, and provided on its lower edge withthe cut-away portions or recesses 12 b, as shown.

G C are levers depending from the shaft B, having their upper endsenlarged, rounded, and hollowed, so as to slip thereon, the said upperend being situated in two of the re 'cesses I; made for theiraccommodation.

L and forth by=the legs of the operator seated as shown.

in the chair.

a c are foot-rests, the stems 'c' of which pass into longitudinalrecessesin the lower ends of 5 5 the levers O, and are made adjustablelongitudinallytherein by proper holes and screws,

' Each of the levers C may, by means of its rounded head, be turned toany desired angle on the shaft B,and be fixed at that an.-

gle by a set-screw, o passing through the rear part of said head andbindingon the shaft.

The forward ends of the foot-rests are provided .with straps c topassover the'toes and aid inkeeping the feet in place. y

5 D is a hanging rod, having its upper end similar to those of thelevers O, and fitting over the shaft B in one of the recesses 12, nearoneside of the chair. The lower'end of the rod D is slottedlongitudinally from front to 7:)

rear, andprovided with the holes d. chines operated by a treadle, and itconsists (if is a pitman, the front end of which passes through the slotin the rod D, and is made vertically adjustable therein by means of theholes d and a proper screw, as shown.-' The 7 rearend'of the rod d isconnected with the crank e' of the transverse shaft E, which has properbearings in the side rounds connect; ing the chair-legs, and has fixedupon" it, out side of the crank, the gear-wheel c. 1'80 f is ageariwheel, about one-third of the diameterof the gear-wheel c, withwhich it meshes, and fixed upon the shaft F, which has bearings at oneend in a bracket depending from'the side of the seat, and at the otherin a bracketdepending from a rail fixed across the center-of the seatfrom front to rear.

f is a crank-arm secured to the inner end of the shaft F, inside of thebearing, and provided longitudinally with the holes f '90 G is aconnecting-rod or pitman, therear' Jl end "of which is connected withand made vertically adjustable on the end of the crank-arm f by means ofthe holes f and a proper screw.

. Both the pitmen d and G maybe shortened on their respective cranks bythe aid of perforations formed in their length, or in other usualmanner. The front end of the pitman G is connected to the lower end ofthe hang- 10o ing rod H, which is in all respects similar to the rod D,being provided at its lower end with a similar slot, and havingperforations h, similar to d, by means of which and a suitable screw theend of the pitman G is made vertically adjustable in the slot of the rodH, .the upper end of which is attached to the shaftB by a set-screw in asimilar manner to the rod D.

I is a connecting-rod having its upper end pivoted upon the lower end ofthe rod H, and its lower end pivoted in the fork of a bracket firmlysecured to the edge of the treadle J, as shown. The treadle J isconnected in the ordinary manner to any machine which it is desired tooperate.

.K K are metal straps provided with holes k, in which the pins a and thefront lower ends of the brackets which form the bearings of the treadleJ are inserted to keep the chair and machine at the required distanceapart. The straps may, if desired, be hinged to the lower ends of thepins a and be turned up and secured against the legs of the chair whennot in use. When the levers G are oscillated by the feet of theoperator, themotion is conveyed by the swinging arm D, pitman d, andcrank e to the gear-whee]. e, which imparts itto the gear-wheel f, andthence by the crank-arm f, pitman G, rod H, and connecting-rod I to thetreadle J, the end of the rod I being adjusted higher or lower on therod H to give the treadle a greater or less swing. Increased rapidity ofmotion of the treadle over that of the levers G is obtained by means ofthe gear-wheels c and f.- The levers O are in practice made to conformto the bend of the rear of the legs for comfort and convenience, and thefoot-rests are adjusted thereon to suit the length of the legs; also,the said levers are adjusted at a convenient angle on the shaft B bytheir set- V Screws.

When it is not desired to use the gearing, the lever d is detached fromthe rod D and the crank c, and the lever G from the rod H andcrank-arm-f. The treadle then swings in unison with the levers G, andgreater or less swing is obtained by adjusting the rod I, by means ofperforations made for that purpose and a proper setscrew, higher orlower upon the rod H.

In using the gearing the inner or upper end of the rod I may be attacheddirectly to the crank-arm f, the pitman G being detached. The rod G thenremains idle. The hood b prevents the shaft B from rubbing against theperson of the operator when it oscillates, thereby causing friction.

L is a rod having its lower end squared, and fitting by a proper openingover either end of the shaft B,outside of the bearing of the same, thesaid end being squared for its reception. Z is afan attached to theupper end of said rod, and made vertically adjustable thereon by anyproper means. As the shaft B oscillates, the rod L will vibrate and fanthe operator. Having thus described my inventiomwhat I claim, and desireto secure by Letters Patent,

1, In the motor of a machine operated by a treadle, the combination,with a chair, A, for the operator,provided at its front with anoscillating transverse s'haft having hearings in the chair, and havingattached the levers 0, provided with the adjustable foot-rests c, of

the swinging rodD, connected by thepitman.

d" to, the crank c of the shaft 13, the gearwheels 6 and f, the shaftF,provided with the crank-arm f,and the connecting-rod I,pivoted to saidcrank-arm and to the treadle J, sub

stantially as specified.

2. In a motor of a machine operated by a treadle, the combination, withthe chair A,

oscillating shaft 13, andlevers G,provided with the foot-rests c, of theswinging rodH, conneoting-rod I, and treadle J, substantially asspecified.

3. In a motor-machine operated by a treadle, the combination, with thechair A, shaft B, levers 0, provided with the foot'rests c, and swingingrods D and H, of the pitmen d and G, shafts Eand F, gear-wheels c and f,crank armf, connecting-rod I, and treadle J substantially as specified.t t t t 4. In a motor mechanism for a machine,the combination, with thechair A, oscillating shaft B, and vibrating levers O, of the fanningheld at the desired distanceapart, substan= tially as specified.

In testimony whereof I affix my signature in presence of two witnesses.

MELOHESEDECK YOUNG THOMPSON.

Witnesses:

W. W. HEARD, W. E. BARKMAN.

ICC

